Here's a link that "Caper" posted that will show you how to do it.
http://www.bigboyzheadporting.com/showthread.php?t=87
These guys also do some nice head porting and are very reasonable. I know George from elsewhere.
http://www.bigboyzheadporting.com/showthread.php?t=87
These guys also do some nice head porting and are very reasonable. I know George from elsewhere.